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Code Issues Releases Wiki Activity

repository: Move cache preparation into function

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This commit is contained in:
Alexander Neumann 2018-03-31 09:50:45 +02:00
parent 22d5061df2
commit 2e7ec717c1
1 changed files with 62 additions and 41 deletions
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103
internal/repository/repository.go
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@ -413,52 +413,73 @@ func (r *Repository) LoadIndex(ctx context.Context) error {
r.idx.Insert(idx)
}
if r.Cache != nil {
// clear old index files
err := r.Cache.Clear(restic.IndexFile, validIndex)
if err != nil {
fmt.Fprintf(os.Stderr, "error clearing index files in cache: %v\n", err)
}
packs := restic.NewIDSet()
for _, idx := range r.idx.All() {
for id := range idx.Packs() {
packs.Insert(id)
}
}
// clear old data files
err = r.Cache.Clear(restic.DataFile, packs)
if err != nil {
fmt.Fprintf(os.Stderr, "error clearing data files in cache: %v\n", err)
}
treePacks := restic.NewIDSet()
for _, idx := range r.idx.All() {
for _, id := range idx.TreePacks() {
treePacks.Insert(id)
}
}
// use readahead
cache := r.Cache.(*cache.Cache)
cache.PerformReadahead = func(h restic.Handle) bool {
if h.Type != restic.DataFile {
return false
}
id, err := restic.ParseID(h.Name)
if err != nil {
return false
}
return treePacks.Has(id)
}
err := r.PrepareCache(validIndex)
if err != nil {
return err
}
return <-errCh
}
// PrepareCache initializes the local cache. indexIDs is the list of IDs of
// index files still present in the repo.
func (r *Repository) PrepareCache(indexIDs restic.IDSet) error {
if r.Cache == nil {
return nil
}
// clear old index files
err := r.Cache.Clear(restic.IndexFile, indexIDs)
if err != nil {
fmt.Fprintf(os.Stderr, "error clearing index files in cache: %v\n", err)
}
packs := restic.NewIDSet()
for _, idx := range r.idx.All() {
for id := range idx.Packs() {
packs.Insert(id)
}
}
// clear old data files
err = r.Cache.Clear(restic.DataFile, packs)
if err != nil {
fmt.Fprintf(os.Stderr, "error clearing data files in cache: %v\n", err)
}
treePacks := restic.NewIDSet()
for _, idx := range r.idx.All() {
for _, id := range idx.TreePacks() {
treePacks.Insert(id)
}
}
// use readahead
debug.Log("using readahead")
cache := r.Cache.(*cache.Cache)
cache.PerformReadahead = func(h restic.Handle) bool {
if h.Type != restic.DataFile {
debug.Log("no readahead for %v, is not data file", h)
return false
}
id, err := restic.ParseID(h.Name)
if err != nil {
debug.Log("no readahead for %v, invalid ID", h)
return false
}
if treePacks.Has(id) {
debug.Log("perform readahead for %v", h)
return true
}
debug.Log("no readahead for %v, not tree file", h)
return false
}
return nil
}
// LoadIndex loads the index id from backend and returns it.
func LoadIndex(ctx context.Context, repo restic.Repository, id restic.ID) (*Index, error) {
idx, err := LoadIndexWithDecoder(ctx, repo, id, DecodeIndex)